FKIE_CVE-2020-14399

Vulnerability from fkie_nvd - Published: 2020-06-17 16:15 - Updated: 2026-06-17 02:54
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.
References
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1860354Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttps://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2dPatch
cve@mitre.orghttps://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13Release Notes
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4434-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1860354Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2dPatch
af854a3a-2127-422b-91ae-364da2661108https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13Release Notes
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4434-1/Third Party Advisory
Impacted products
Vendor Product Version
libvncserver_project libvncserver *
debian debian_linux 8.0
debian debian_linux 9.0
opensuse leap 15.1
opensuse leap 15.2
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
canonical ubuntu_linux 20.04
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
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              "matchCriteriaId": "4F3C4EF0-4663-4832-8662-D1AB70E562E7",
              "versionEndExcluding": "0.9.13",
              "vulnerable": true
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          "negate": false,
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  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "disputed"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly \"no trust boundary crossed."
    },
    {
      "lang": "es",
      "value": "**EN DISPUTA** Se detect\u00f3 un problema en LibVNCServer versiones anteriores a 0.9.13. Los datos Byte-aligned son accedidos por medio de punteros uint32_t en la biblioteca libvncclient/rfbproto.c. NOTA: se informa que \"no se ha cruzado ning\u00fan l\u00edmite de confianza\"."
    }
  ],
  "id": "CVE-2020-14399",
  "lastModified": "2026-06-17T02:54:41.937",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-06-17T16:15:11.930",
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      "tags": [
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    },
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          "value": "NVD-CWE-Other"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.